Is nested form possible in dynamic forms in angular 2 without using of formbuilder

Angular's (2.x+) approach to nested forms is not similar to AngularJS (1.x).

In Angular, FormGroups and FormArrays are already letting you create a nested form.

<form [formGroup]="fatherForm">

   <input [formControl]='fatherForm.get('firstName')'>

   <form  [formGroup]="fatherForm.get('childForm')">
       <input [formControl]='fatherForm.get('childForm.aNestedControl')'>
   </form>
</form>

And then in the class :

fatherForm = new FormGroup({

    firstName : new FormControl()

    childForm: new FormGroup({

        aNestedControl : new FormControl()

    })

})

you can even make it cleaner in the html by creating getters:

in the class :

   get childForm(){
       return this.fatherForm.get('childForm')

   }

and then in the html :

<form [formGroup]="fatherForm">

   <input [formControl]='fatherForm.get('firstName')'>

   <form  [formGroup]="childForm">
       <input [formControl]='childForm.get('aNestedControl')'>
   </form>
</form>